La fuerza y el movimiento (Forces and Motion)

Kids often play with magnets, yet they don't learn how these playthings work for many years. Practical knowledge from their play can help them learn more about magnetism, and so can this book. Specially written for those with reading challenges or readers looking for a review, the main text covers important vocabulary, magnetic fields, and a discussion of why metals and magnets come together. Diagrams and succinct fact boxes offer additional ways to learn each concept and explain some ideas in greater detail.

The US president is the face of the United States to the rest of the world. However, he or she doesn’t have unlimited power within the country. The president has certain powers given by the Constitution, including the ability to make treaties, appoint some important government officials, and veto laws. Readers learn the many duties of the president in simple, clear language appropriate for both younger readers and older readers looking for a succinct review of the topic. Fact boxes supplement the main content with important details about checks and balances, amendments, and more that affect...

“Dino” Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children’s books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these horned dinosaurs face-to-face: Torosaurus had the biggest skull of any animal ever! Pentaceratops had five sharp horns on its head! Styracosaurus was as big as an ice cream truck! Plus, you'll get to know Centrosaurus,...

This book will increase your child's vocabulary in English and Spanish by associating numbers with beautiful pictures and touch and feel elements.

El objetivo de esta obra no es tanto la dogmática de la acción y de la comisión por omisión en sí mismas consideradas, sino básicamente el ajuste de ambas al principio de legalidad. Como ese ajuste es profundamente discutible, se ha creído necesaria una reflexión sobre los fundamentos y los fines de la dogmática penal. El resultado de esa reflexión es alarmante porque muestra un abuso del Derecho penal que no se limita a la comisión por omisión ni a la vulneración del principio de legalidad, sino que va mucho más allá. En efecto, hay muchas otras amenazas para la libertad que...

Una manera rigurosa, pero amena de explicar a los chicos qué es la religión. “Cada religión es una especie de declaración de amor. O lo que es lo mismo, el sentimiento religioso es lo más personal que posee un ser humano.” ¿Sabes qué es la religión? ¿Has pensado alguna vez que muchas personas creen en la existencia de algo superior? ¿Quién es Dios? ¿Se llama igual en todas las religiones? ¿Es el mismo para todos? ¿ Existen muchas diferencias entre las diversas religiones? Este libro te ayudará a responder a todas esas preguntas y a través de un viaje fascinante por el...